Drill-bit lifter.



M. MQGARTHY.

DRILL BIT LIFTER.

. APPLICATION BBBBBBB PT. 111111 2.

1 ,077,089, Patented Oct. 28, 1913'.

WITNESSES ay ATTORNEYS UNITED STATES PATENT .QFFTC.

MICHAEL MCCARTHY, OF STEWARTSVILLE, NEW JERSEY.

DRILL-BIT LIFTER.

Specification of Letters Patent.

Patented Oct. 28, 1913.

Application filed September 16, 1912. Serial No. 720,568.

chines, and its object is to provide a newand improved drill bit lifter, to enable an operator to readily raise and sustain the drill whenever it is desired to couple or uncouple the drill rod and bit. For the urpose mentioned use is made of a stan ,a treadle lever fulcrumed on the said stand and under the control of an operator, and

a support for the bit mounted on the said treadle lever, the support having a seat for the cutting edge of the bit to rest on.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in both views.

Figure l is a side elevation of the drill bit lifter as applied and showing the bit and drill rod uncoupled; and Fig. 2 is an enlarged sectional side elevation of a portion of the treadle lever and the drill bit support held thereon. 7

On a suitably-constructed portable stand A is fulcrumed at B a treadle lever C provided at one end with a foot-piece C adapted to be engaged by the foot of an operator for imparting a swinging motion to the treadle lever C. The free end of the treadle lever C is provided with a bearing C in which is mounted to turn the shank or stem D of a drill bit support D, provided on the top with a head D having a V-shaped seat D on which is adapted to be seated the cutting edge E of a drill bit E to be coupled to or uncoupled from a drill rod F. The support D immediately below the head D is provided with an annular shoulder D resting on top of the bearing C and on the lower end of the shank D is arranged a cotter pin G abutting against a washer H at the under side of the bearing C so that the drill bit support D is held against accidental disconnection from the bearing G The lower end of the shank D normally rests on a stockA forming art of a handle A integral o-nthe stand 2 to permit of conveniently carrying the drill bit lifter about.

When the several parts are in the position shown in Fig. 1, the cutting edge E of the drill bit E can be readily placed in position on the seat D and then the operator on pressing the foot-piece C imparts a swing ing motion to the treadle lever C, so that the drill bit E is lifted to permit of readily coupling the drill bit to the drill rod F, it being understood that on raising the drill bit E the operator has both hands free to couple the drill bit E with the drill rod F without being required to support the weight of the heavy drill bit E with his hands.

From the foregoing it will be seen that by the arrangement described, the operator can conveniently couple the drill bit E with the treadle rod F oruncouple the same without being required to support the drill bit E with the hands during the coupling operation.

The drill bit lifter shown and described is very simple and durable in construction. and can be readily placed in position for lifting the drill bit or movingit to one side when not in use. 7

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A drill bit lifter, comprising a portable stand having a stop,'a treadle lever fulcrumed on the said stand, and a drill bitsupport having a head and a shank, the shank being journaled in the said treadle lever and being adapted to rest on the said stop, and the said head having a V-shaped groove on top for the reception of the cutting edge of the drill bit.

2. A drill bit lifter, comprising a portable stand having a stop, a treadle lever fulcrumed on the said stand, a drill bit support having a head and a shank, the shank being journalecl in the said treaclle lever and name to this specification in the presence of being adapted to rest on the said stop and two subscribing Witnesses. the said head havlng a V-shaped groove on top for the reception of the cutting edge of MICHAEL MCCARTHY 5 the drill bit, and means for holding the said Witnesses:

shank against removal from the treaclle lever. BESSIE A. BUSH,

In testimony whereof I have sign-ed my ROBERT L. MORRELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington,.D. G." 

